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0112153a0e
openwrt/target/linux/ar71xx/patches-2.6.39
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Gabor Juhos 0112153a0e ar71xx: fix occasional kernel hangs during boot on AR934x 
The patch taken from the linux-mips mailing list.

The Kernel hangs occasionally during boot after
"Calibrating delay loop..". This is caused by the
c0_compare_int_usable() routine in cevt-r4k.c
returning false which causes the system to disable
the timer and hang later. The false return happens
because the routine is using a series of four calls
to irq_disable_hazard() as a delay while it waits
for the timer changes to propagate to the cp0 cause
register. On newer MIPS cores, like the 74K, the
series of irq_disable_hazard() calls turn into ehb
instructions and can take as little as a few clock
ticks for all 4 instructions. This is not enough of
a delay, so the routine thinks the timer is not
working.

This fix uses up to a max number of cycle counter
ticks for the delay and uses back_to_back_c0_hazard()
instead of irq_disable_hazard() to handle the hazard
condition between cp0 writes and cp0 reads.

SVN-Revision: 29009
2011-11-13 11:26:52 +00:00
..
001-ar71xx_core.patch ar71xx: add 2.6.39 support 2011-06-29 08:57:32 +00:00
002-ar71xx_pci.patch ar71xx: add 2.6.39 support 2011-06-29 08:57:32 +00:00
003-ar71xx_usb_host.patch ar71xx: add 2.6.39 support 2011-06-29 08:57:32 +00:00
004-ar71xx_spi_controller.patch ar71xx: add 2.6.39 support 2011-06-29 08:57:32 +00:00
005-ar71xx_mac_driver.patch ar71xx: add 2.6.39 support 2011-06-29 08:57:32 +00:00
006-ar71xx_wdt_driver.patch ar71xx: add 2.6.39 support 2011-06-29 08:57:32 +00:00
007-ar91xx_flash_driver.patch ar71xx: add 2.6.39 support 2011-06-29 08:57:32 +00:00
101-ksz8041_phy_driver.patch ar71xx: add 2.6.39 support 2011-06-29 08:57:32 +00:00
102-mtd_m25p80_add_myloader_parser.patch ar71xx: add 2.6.39 support 2011-06-29 08:57:32 +00:00
104-mtd_m25p80_add_redboot_parser.patch ar71xx: add 2.6.39 support 2011-06-29 08:57:32 +00:00
107-mtd-SST39VF6401B-support.patch ar71xx: add 2.6.39 support 2011-06-29 08:57:32 +00:00
108-mtd_fix_cfi_cmdset_0002_status_check.patch ar71xx: add 2.6.39 support 2011-06-29 08:57:32 +00:00
109-mtd-wrt160nl-trx-parser.patch ar71xx: add 2.6.39 support 2011-06-29 08:57:32 +00:00
110-usb-ehci-add-war-for-synopsys-hc-bug.patch ar71xx: make ehci patch apply again 2011-08-10 23:02:56 +00:00
111-mtd-cfi_cmdset_0002-force-word-write.patch ar71xx: add 2.6.39 support 2011-06-29 08:57:32 +00:00
120-dsa-trailer-tag-validation-fix.patch ar71xx: add 2.6.39 support 2011-06-29 08:57:32 +00:00
121-dsa-add-88e6063-driver.patch ar71xx: add 2.6.39 support 2011-06-29 08:57:32 +00:00
140-redboot_partition_scan.patch ar71xx: add 2.6.39 support 2011-06-29 08:57:32 +00:00
150-drivers-link-spi-before-mtd.patch ar71xx: add 2.6.39 support 2011-06-29 08:57:32 +00:00
151-spi-add-various-flags.patch ar71xx: add 2.6.39 support 2011-06-29 08:57:32 +00:00
152-rb4xx-spi-driver.patch ar71xx: add 2.6.39 support 2011-06-29 08:57:32 +00:00
153-spi-rb4xx-cpld-driver.patch ar71xx: add 2.6.39 support 2011-06-29 08:57:32 +00:00
200-rb4xx_nand_driver.patch ar71xx: add 2.6.39 support 2011-06-29 08:57:32 +00:00
201-ap83_spi_controller.patch ar71xx: add 2.6.39 support 2011-06-29 08:57:32 +00:00
202-spi_vsc7385_driver.patch ar71xx: add 2.6.39 support 2011-06-29 08:57:32 +00:00
203-pb44_spi_controller.patch ar71xx: add 2.6.39 support 2011-06-29 08:57:32 +00:00
205-wndr3700-usb-led-driver.patch ar71xx: refresh kernel patches 2011-11-13 11:26:51 +00:00
206-nxp-74hc153-gpio-chip-driver.patch ar71xx: add 2.6.39 support 2011-06-29 08:57:32 +00:00
207-rb750-led-driver.patch ar71xx: refresh kernel patches 2011-11-13 11:26:51 +00:00
208-rb750-nand-driver.patch ar71xx: add 2.6.39 support 2011-06-29 08:57:32 +00:00
300-mips_fw_myloader.patch ar71xx: add 2.6.39 support 2011-06-29 08:57:32 +00:00
400-2.6.35-fix-nand_scan_ident-options.patch ar71xx: add 2.6.39 support 2011-06-29 08:57:32 +00:00
500-ar933x-uart-driver.patch ar71xx: add 2.6.39 support 2011-06-29 08:57:32 +00:00
901-get_c0_compare_irq_function.patch ar71xx: add 2.6.39 support 2011-06-29 08:57:32 +00:00
902-fix-occasional-kernel-hangs-during-boot.patch ar71xx: fix occasional kernel hangs during boot on AR934x 2011-11-13 11:26:52 +00:00
910-unaligned_access_hacks.patch ar71xx: add some hacks to work around the misalignment in IP packets received on AR71xx and AR91xx ethernet MACs decreases CPU load with the default firewall for routing 95 mbit/s from 78% to 55% 2011-08-02 15:12:08 +00:00
920-mdio_bitbang_ignore_ta_value.patch ar71xx: add a workaround for ar8316 not always driving the TA bit to low 2011-10-11 23:05:13 +00:00